61.
|
A works twice as fast as B. If B can
complete a work in 12 days independently, the number of days in which A and B
can together finish the work in :
|
|
|
4 days
|
|
6 days
|
|
|
8 days
|
|
18 days
|
|
62.A works twice as fast as B. If B can
complete a work in 12 days independently, the number of days in which A and B
can together finish the work in :
A. 4 days
B. 6 days
C. 8 days
D. 18 days
63.
|
Twenty women can do a work in sixteen days.
Sixteen men can complete the same work in fifteen days. What is the ratio
between the capacity of a man and a woman?
|
|
|
3 : 4
|
|
4 : 3
|
|
|
5 : 3
|
|
Data inadequate
|
|
64.A can do a certain job in 12 days. B is
60% more efficient than A. How many
days does B alone take to do the same job?
A. 10
B. 15/2
C. 14
D. 24/3
65.
|
A and B can do a work in 8 days, B and C
can do the same work in 12 days. A, B and C together can finish it in 6 days.
A and C together will do it in :
|
|
|
4 days
|
|
6 days
|
|
|
8 days
|
|
12 days
|
|
66.A machine P can print one lakh books in 8
hours, machine Q can print the same number of books in 10 hours while machine R
can print them in 12 hours. All the machines are started at 9 A.M. while
machine P is closed at 11 A.M. and the remaining two machines complete work.
Approximately at what time will the work (to print one lakh books) be finished?
A. 11:30 A.M.
B. 12 noon
C. 12:30 P.M.
D. 1:00 P.M.
67.
|
A can finish a work in 24 days, B in 9 days
and C in 12 days. B and C start the work but are forced to leave after 3
days. The remaining work was done by A in:
|
|
|
68.A and B working separately can do a piece
of work in 9 and 12 days respectively, If they work for a day alternately, A
beginning, in how many days, the work will be completed?
A. 21/4
B. 31/4
C. 51/4
D. 41/4
69.
|
X can do a piece of work in 40 days. He
works at it for 8 days and then Y finished it in 16 days. How long will they
together take to complete the work?
|
|
|
70.A can do a certain work in the same time
in which B and C together can do it. If A and B together could do it in 10 days
and C alone in 50 days, then B alone could do it in:
A. 15 days
B. 20 days
C. 25 days
D. 30 days
